KR20100008984A - An apparatus for resource allocation in a frequency overlay system and a method thereof - Google Patents

Abstract

PURPOSE: A resource allocation method and an apparatus thereof for reducing the amount of data of resource allocation information in a frequency overlay system are provided to reduce the whole message overhead by transmitting resource allocation information. CONSTITUTION: An address type selecting unit(110) selects an address type according to FA(Frequency Assignment) of the user terminal. A resource assigning unit(120) generates resource allocation information as allocation address value according to the selected address type. A map generating unit(130) generates a map message having resource allocation information. The map generation part transmits through the main part assigned frequency of the user terminal.

Description

An apparatus for resource allocation in a frequency overlay system and a method

The present invention relates to an apparatus and method for allocating resources of a frequency overlay system, and more particularly, to an apparatus and method for allocating a resource of a frequency overlay system that can reduce overhead when providing resource allocation information of a base station in a frequency overlay system.

Frequency overlay refers to a technique in which a base station divides an available frequency band and uses a frequency band available to the user terminal among the divided frequency bands to communicate with the base station and the user terminal. That is, the frequency overlay is a method for simultaneously supporting terminals having various bandwidths in a wireless communication system. That is, the base station divides the radio resource into a plurality of frequency assignments (FAs), and communicates with the user terminal through a single or a plurality of FAs according to the bandwidth supported by the user terminal. For example, if there is a frequency overlay support system with a 20 MHz bandwidth that simultaneously supports a terminal supporting 10 MHz bandwidth and a terminal supporting 20 MHz bandwidth, the 10 MHz terminal is operated by allocating one FA from the base station, and 20 MHz The terminal is allocated two FAs having a bandwidth of 10 MHz and operated with a bandwidth of 20 MHz.

In order to display resource allocation information in a system that supports frequency overlay, a method of generating and transmitting a resource allocation information message is separately used for every FA. That is, when transmission resources of a user terminal are simultaneously allocated to FA 1 and FA 2, the allocation information in FA1 is transmitted in the resource allocation information message of FA1, and the allocation information in FA2 is transmitted in the resource allocation information message of FA2. Therefore, since terminals simultaneously allocated to a plurality of FAs must receive and decode all resource allocation information of all FAs, complexity increases, and resource allocation information message overhead increases in proportion to the number of FAs.

Accordingly, an object of the present invention in view of the above-described problems is to transmit and receive resource allocation information to only one FA in a frequency overlay system, thereby reducing the overall message overhead and reducing the amount of data in the resource allocation information. An apparatus and method for allocating resources for reducing message overhead according to the present invention are provided.

In the frequency overlay system for resource allocation according to an embodiment of the present invention for achieving the above object, an allocation address value of a transmission resource allocated according to any one address type and the one address type of a plurality of address types A base station for transmitting resource allocation information comprising a; And a user terminal that receives the resource allocation information and receives data of the allocated transmission resource according to the address type and the assigned address value of the received resource allocation information.

In accordance with an aspect of the present invention, there is provided a method for allocating a transmission resource of a frequency overlay system according to an embodiment of the present invention. Transmitting the resource allocation information including the allocation address value, and receiving the resource allocation information by the user terminal and receiving the data of the allocated transmission resource according to the address type and allocation address value of the resource allocation information received; It includes;

An apparatus for allocating a transmission resource of a base station according to a frequency overlay system for dividing and using an available frequency into a plurality of frequency bands according to a preferred embodiment of the present invention for achieving the above object is one of a plurality of connected user terminals. An address type selection unit for selecting an address type according to an allocation frequency (FA) of a user terminal to which a resource is allocated; A resource allocator configured to generate resource allocation information indicating an allocated address of the user terminal according to the selected address type; And a map transmitter for generating a map message having the resource allocation information and transmitting the same through a primary FA of the user terminal.

The transmission resource allocation method of the base station according to the frequency overlay system using the available frequency divided into a plurality of frequency bands according to a preferred embodiment of the present invention for achieving the above object, any one of a plurality of address types Generating resource allocation information including an address type and an allocation address value of a transmission resource allocated according to the one address type; generating a map message having the resource allocation information; Transmitting on the primary assigned frequency of the primary FA.

An apparatus for allocating a transmission resource of a user terminal according to a frequency overlay system for dividing and using an available frequency into a plurality of frequency bands according to a preferred embodiment of the present invention for achieving the above object includes a primary assigned frequency (primary FA). A map analyzing unit for receiving a map message through the s) and detecting resource allocation information from the received message; And a data processor configured to receive a transmission resource region allocated to the terminal according to the address type and the assigned address value of the resource allocation information.

In the transmission resource allocation method of the user terminal according to the frequency overlay system using the available frequency divided into a plurality of frequency bands in accordance with a preferred embodiment of the present invention for achieving the above object, the map from the main allocation frequency Receiving the message and detecting resource allocation information from the received map message; and receiving data of a transmission resource region allocated to the terminal according to the address type and the assigned address value of the resource allocation information.

According to the present invention, it is possible to reduce message overhead by providing information on a transmission resource region allocated according to a different address type for each user terminal without transmitting transmission resources allocated for each FA of a specific user terminal individually. have. Accordingly, there is an advantage that the performance of the system is improved.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

First, a frequency overlay system according to an embodiment of the present invention will be described. 1 is a conceptual diagram of a frequency overlay system according to an embodiment of the present invention.

The frequency overlay system according to an embodiment of the present invention communicates with the base station 100 by using a base station 100 that divides and uses a frequency band and some or all of the divided frequency bands of the base station 100. And a plurality of user terminals 201-204. Hereinafter, when the user terminals are collectively used as "user terminals", reference numeral 200 will be used.

In FIG. 1, it is assumed that the frequency band of the base station 100 is 40 MHz, and the base station 100 may divide the frequency band into four. As such, each divided frequency band is referred to as FA ("Frequency Assignment", "Assignment Frequency"). Here, the base station 100 divides into frequencies of FA 1 to FA 4, and assumes that 10 MHz is allocated to each FA.

In addition, each of the user terminals 201 to 204 can use only a specific bandwidth due to the " capability " of the device. The specific bandwidth determined by the characteristics of the user terminal 200 will be referred to as "available bandwidth". Accordingly, the user terminals 201 to 204 may use at least one of frequency bands FA 1 to FA 4 of the base station 100 according to available bandwidths supported by each user terminal. At this time, the base station 100 and the user terminal 200 determine the "number of FAs to use" and "FA number to use" during the initial connection of the user terminal 200 to the base station 100 through a negotiation process. In particular, when one user terminal 200 uses a plurality of FAs, the base station 100 and the user terminal 200 determine a primary FA.

After determining the FA number to be used, the base station 100 allocates a transmission resource according to the determined FA of the user terminal 200 and sets information on the allocated transmission resource, that is, resource allocation information (MAP-IE). Send via FA.

As such, in order to communicate the base station 100 and the user terminal 200 by dividing the frequency band, the base station 100 and the user terminal 200 are performed when the user terminal 200 is initially connected to the base station 100. Through the "capability" negotiation process, the user terminal 200 determines the FA number and FA numbers that can be transmitted or received at the same time.

That is, the base station 100 recognizes the available bandwidth of the user terminal 200 upon initial access to the base station 100 and determines an FA to be allocated to the user terminal 200 according to the available bandwidth. do. At least one usable FA is determined according to the available bandwidth of the user terminal 200. Available FAs are maintained until changed in a separate procedure.

The base station 100 allocates resources to the corresponding user terminal 200 according to the determined FA. Referring to FIG. 1, for example, a first user terminal 201 capable of using 10 MHz uses FA 1 and receives resource allocation information (MAP-IE) through FA 1.

The second user terminal 202 capable of using 20 MHz may use two of the frequencies of FA 1 through FA 4. It is assumed that the second user terminal 202 is determined to use FA 1 and FA 2 in the negotiation process with the base station 100. Also assume that FA1 is used as the primary FA. Then, the second user terminal 202 is allocated a transmission resource to the FA 1 and FA 2, and receives the resource allocation information (MAP-IE), which is information about the allocated transmission resources through the FA 1. Similarly, the third user terminal device 203 capable of using 30 MHz uses FA 2 to FA 4 and receives resource allocation information (MAP-IE) through FA 2, which is a main FA. In addition, the fourth user terminal 200 capable of using 40 MHz uses all of FA 1 to FA 4 from the base station 100 and receives resource allocation information (MAP-IE) through the FA 4.

Then, the transmission resources allocated by the base station 100 will be described. 2A to 2B are diagrams for describing a transmission resource allocation method according to an embodiment of the present invention.

2A illustrates a structure in which transmission resources are allocated in the frequency overlay system. A transmission resource consists of a plurality of FAs and a plurality of transmission resource blocks transmitted to the FA. Here, R (n, m) means the mth transmission resource of FA n, and M (n) means the number of resources to be allocated (number of transmission resource blocks) in FA n. do. In this case, the transmission resource may be an uplink or a downlink. In addition, a unit of a transmission resource block may be time or frequency.

As shown, the frequency bands allocable to the base station 100 include FA 1 to FA 4, and there are eight transmission resource blocks that can be allocated to each FA. Here, transmission resources are allocated to each of the first to fourth user terminals 201 to 204. At this time, the transmission resources allocated to each of the user terminals 201 to 204 are shown by hatching in the figure.

In order to provide the user terminal 200 with information about transmission resources allocated to the user terminal 200, the base station 100 generates resource allocation information (MAP-IE) for each user terminal 201 to 204.

The base station 100 allocates transmission resources according to FAs that can be used by each of the user terminals 201 and 204, and allocates resource allocation information (MAP Information Element) to inform each user terminal 201 to 204 of the allocated transmission resources. MAP-IE). Resource allocation information (MAP-IE) has information about the location of the transmission resource block allocated to each user terminal (201 to 204).

Resource allocation information (MAP Information Element: MAP-IE) according to an embodiment of the present invention is a "resource indicator" for indicating the allocated resource, "address type" (address type, Addr_type), "allocation address value" Include.

The address type means an order of assigning an "address" to each transport resource block of the transport resource as shown in FIG. 2A. "Address" is information indicating the location of each transport resource block, and the location information of each transport resource block is expressed differently according to each "address type". The address of one transport resource block depends on the address type. That is, each transport resource block has a different address according to the address type. An "allocation address value" or an "address value" is a value indicating an address ("location") of an allocated RB according to a specific address type.

A method of generating resource allocation information according to such a resource allocation method will be described. 2B illustrates a structure in which the transmission resources of FIG. 2A are allocated to each terminal. Here, reference numerals (a) to (d) show transmission resources allocated to each of the first to fourth user terminals 201 to 204, respectively.

In (a), the addresses assigned according to the transmission resource and the address type allocated to the first user terminal 201 are shown together. In addition, Table 1 below is an example of resource allocation information (MAP-IE) indicating a transmission resource allocated to the first user terminal 201.

start-length start-end Identifier CID1 (4 FA MS) Modulation coding method MCS Allocation Address Value Start: 26, Length: 4 Start: 26, end: 29 Address type Addr_type: 1 Addr_type: 1 Etc Etc (power, MIMO related)

Referring to <Table 1>, the resource allocation information (MAP-IE) includes an identifier (Connection ID: CID), a modulation coding scheme (MCS), and a resource indicator. In particular, the resource indicator includes an address type (Address type, Addr_type) and an assigned address value. In addition, it may further include other information such as transmit power, antenna type (eg, MIMO).

The identifier (CID) is information for distinguishing a plurality of user terminals 200 connected to the base station 100 and includes information (4 FA MS) on how many FAs the user terminal 200 can use. do. The modulation coding scheme (MCS) describes data in a modulation and coding scheme. The resource indicator also includes an address type and an assigned address value, as described above. The assigned address value is a start-length scheme indicating the start address of the allocated transmission resource and the length of the allocated transmission resource and a start-end indicating the start address and the end address of the allocated transmission resource. end) method.

In more detail, in order to express the transmission resource allocated to the first user terminal 201, the address type Addr_type uses a first type 1. The first address type (Addr_type: 1) sequentially assigns address 0 to address 7 from the first to the last transmission resource block of FA 1, and in the same manner, addresses are addressed in order of FA 2, FA 3, and FA 4. .

The base station 100 allocates a transmission resource block having addresses 26 to 29 in this address type as a resource of the first user terminal 201. Therefore, the address value of the allocated transmission resource block may be expressed as a start address (start: 26) and an allocation length (length: 4) from the start address to the transmission resource block where resource allocation ends. That is, an address value of an allocated transmission resource block may be expressed using an address type, a starting point, and an allocation length.

In another embodiment, an address value of an allocated transmission resource block may be expressed using an address type, a start address, and a start-end. That is, the end address (end: 29) may be described instead of the allocation length (start: 26).

In (b), transmission resources and resource allocation information allocated to the second user terminal 202 are illustrated. In addition, Table 2 below is an example of resource allocation information (MAP-IE) indicating a transmission resource allocated to the second user terminal 202.

start-length start-end Identifier CID2 (4 FA MS) Modulation coding method MCS Allocation Address Value Start: 16, Length: 4 Start: 16, end: 19 Address type Addr_type: 2 Addr_type: 2 Etc Etc (power, MIMO related)

In order to express the transmission resource allocated to the second user terminal 202, the address type Addr_type uses a second type. The second address type (Addr_type 2) is assigned an address from the first block to the last block of FA 1 and FA 2 first, and then an address from the first block to the last block of FA3 and FA4.

The base station has allocated a transmission resource block having addresses 16 to 19 in this address type as a resource of the second user terminal 202. Accordingly, the allocated transmission resource block may be expressed as a start address (start: 16) and an allocation length (length: 4) from the start address to the transmission resource block where resource allocation ends. On the other hand, when using a start address and a start-end (start-end) can be described as the start address (start: 16) and the end address (end: 19) as the assigned address value.

In (c), transmission resources and resource allocation information allocated to the third user terminal 203 are illustrated. In addition, Table 3 below is an example of resource allocation information (MAP-IE) indicating a transmission resource allocated to the third user terminal 203.

start-length start-end Identifier CID3 (4 FA MS) Modulation coding method MCS Allocation Address Value Start: 4, Length: 8 Start: 4, end: 11 Address type Addr_type: 3 Addr_type: 3 Etc Etc (power, MIMO related)

In order to express the transmission resource allocated to the third user terminal 203, the second type (type 3) is used as the address type Addr_type. The third address type (Addr_type 3) gives the address first from the first block to the last block of FA 1 and FA 2, and then from the first to the last block of FA4 and FA3 in the order of FA4 and FA3. It was.

The base station 100 allocates a transmission resource block having addresses 4 to 11 as the resource of the third user terminal 203 in this address type.

Therefore, the allocated transmission resource block may be expressed as a start address (start: 4) and an allocation length (length: 8) from the start address to the transmission resource block where resource allocation ends. It can also be expressed as a start address (start: 4) and an end address (end: 11).

In (d), transmission resources and resource allocation information allocated to the fourth user terminal 204 are illustrated. In addition, Table 4 below is an example of resource allocation information (MAP-IE) indicating a transmission resource allocated to the fourth user terminal 204.

start-length start-end Identifier CID3 (4 FA MS) Modulation coding method MCS Allocation Address Value Start: 24, Length: 8 Start: 24, end: 31 Address type Addr_type: 4 Addr_type: 4 Etc Etc (power, MIMO related)

In order to express the transmission resource allocated to the fourth user terminal 204, the fourth type (type 4) is used as the address type Addr_type.

The fourth address type (Addr_type 4) uses FA 1 through FA 4, assigns addresses first from the seventh block of FA 1 to the last block of FA 4, and then from the seventh block of FA 1 to the FA 4 Address up to the last block.

The base station 100 allocates a transmission resource block having addresses 24 to 31 in this address type as a resource of the fourth user terminal 204.

Therefore, the allocated transmission resource block may be expressed as a start address (start: 24) and an allocation length (length: 8) from the start address to the transmission resource block where resource allocation ends. Also, start address (start: 24) and end address (end: 31)

As such, the base station 100 displays transmission resources allocated to the corresponding user terminal 200 according to any one of various address types. At this time, the allocation length is displayed to indicate how many transmission resource blocks are allocated consecutively from the start address and the start address at which the resource allocation starts in the scheme according to the assigned address type. The user terminal 200 receives the resource allocation information, finds a start address according to the address type, and knows how many transport blocks are allocated to the transport resources from the start address according to the allocation length. On the other hand, when the resource allocation information (MAP-IE) is transmitted by describing an allocation address value by displaying a start address and a start-end address, the user terminal 200 receives the resource allocation information. According to the type, the start address and the end address are found, and thus, the transport block from the start address to the end address can be known whether the transport resource is allocated to it.

As described above, in order to display the transmission resource allocated to the fourth mobile terminal 204 according to the address setting method according to the related art, the start address assigned to FA 1, the assigned length, the start address assigned to FA 2, and the like. The assignment length, the start address and assignment length assigned to FA 3, and the start address and assignment length assigned to FA 4 must all be indicated in the assignment information. In comparison, the size of the data can be significantly reduced in the resource allocation information (MAP-IE) according to an embodiment of the present invention.

As described above, the number of used FAs of the user terminal 200 may be determined according to available bandwidth, which is a characteristic (“capability”) of the user terminal. The determined usage FA number of the user terminal 200 is known to both the base station 100 and the user terminal 200 and is maintained until it is negotiated again.

The type of address to use for allocation of each user terminal 200 is limited by the number of negotiated usage FAs of that terminal. For example, the resource allocation information (MAP-IE) of the user terminal 200 determined to negotiate with the base station 100 to use only two FAs may be selected from an address type consisting of only two FAs. If there is only one address type consisting of two FAs, there is no need to separately inform the address setting type used for resource allocation of the respective user terminal 200. As described above, when the number of available FAs varies according to the available bandwidth of the user terminal 200, transmission resource allocation and resource allocation information will be described. 3A and 3B are diagrams for describing a transmission resource allocation method according to an embodiment of the present invention.

3A illustrates a structure in which transmission resources are allocated in the frequency overlay system. Frequency bands that can be allocated by the base station 100 include FA 1 to FA 4, and there are eight transmission resource blocks that can be allocated to each FA. Here, transmission resources are allocated to each of the first to sixth user terminals 201 to 206. At this time, the transmission resources allocated to each of the user terminals 201 to 204 are shown by hatching in the figure.

Here, it is assumed that the first to fourth terminals 201 to 204 use four FAs, and the fifth and sixth user terminals 205 and 206 use two FAs. Then, in the case of the first to fourth terminals 201 to 204, the same method as described with reference to FIGS. 2A and 2B may be used. Meanwhile, since the fifth and sixth user terminals 205 and 206 use two FAs, allocation resource information is generated according to an address type corresponding to the two FAs.

As described above, a method of generating resource allocation information of user terminals 200 using different numbers of FAs will be described. 3B illustrates a structure in which transmission resources are allocated according to address types and address types of user terminals 200 using two FAs for each terminal. Here, reference numerals (e) and (f) show an address type and an allocated transmission resource used for the fifth and sixth user terminals 205 to 206, respectively. In addition, Table 5 below is an example of resource allocation information (MAP-IE) indicating a transmission resource position allocated to each user terminal 201 to 206 according to the resource allocation of FIG. 3A.

Since the number of usable FAs is determined according to the available bandwidth of the user terminal 200, the number of address types varies according to the number of FAs, and the number of bits representing the address type may be set differently. Since 4 types of addresses for 4 FA terminals are represented by 2 bits, 2 types of addresses for 2 FA terminals may be represented by 1 bit.

In the resource allocation information of Table 5, the address type (Addr_type: 1) displayed in the resource allocation information of the first user terminal 201 and the fifth user terminal 205 is the same. At this time, since the first user terminal 201 and the fifth user terminal 205 already know the number of their FAs, the first user terminal 201 and the fifth user terminal 205 may interpret the address type of the allocation information accordingly. That is, one address setting type may be interpreted differently according to the number of FAs used by the user terminal 200 to be allocated. That is, when the address setting type is 0, when the allocation target user terminal 200 uses four FAs (4 FAs), the two FAs (2 FAs) are interpreted according to the address type of FIG. 2B (a). If used, it is interpreted in the same manner as in FIG. 3B (e).

Referring to reference numeral (e), the first address type (Addr_type 4) using two FAs uses FA 1 and FA 2, which is given an address first from the transmission resource block of FA 1, and the transmission of FA 2 Give an address to the resource block. The base station 100 allocates a transmission resource block having addresses 2 to 5 as the resource of the fifth user terminal 205 in this address type.

Accordingly, the allocated transmission resource block may be expressed as a start address (start: 2) and an allocation length (length: 4) from the start address to the transmission resource block where resource allocation ends. In addition, a start address (start: 2) and an end address (end: 5) may be used.

Referring to reference numeral (f), the second address type (Addr_type 4) using two FAs uses FA 1 and FA 2, from the first transmission resource block of FA 1 and FA 2 to the last transmission resource block. Assign addresses sequentially. The base station 100 allocates a transmission resource block having addresses 0 to 3 in this address type as a resource of the fifth user terminal 205.

Therefore, the allocated transmission resource block may be expressed as a start address (start: 0) and an allocation length (length: 4) from the start address to the transmission resource block where resource allocation ends. In addition, a start address (start: 0) and an end address (end: 3) may be used.

As such, according to an embodiment of the present invention, an address type may vary according to the number of FAs used, and the user terminal 200 may classify an address type according to the number of FAs used.

In the above embodiment, the base station 100 allocates transmission resources according to the available bandwidth of the user terminal 200. The minimum allocation unit of such a transmission resource is a transmission resource block, and one transmission resource block exists in one FA.

In the frequency overlay system, the user terminal 200 may use a plurality of frequency bands. Therefore, if one transmission resource is allocated over a plurality of frequency bands, diversity gain can be obtained. As described above, a method for obtaining a frequency diversity gain by allowing a minimum allocation unit of transmission resources to exist in a plurality of FAs will be described.

4A to 4C are diagrams for describing a resource allocation method and a method for generating allocation information of allocated resources in a frequency overlay system according to an exemplary embodiment of the present invention.

4A illustrates an example of a transmission resource subblock by dividing each transmission resource block by the maximum number of FAs that can be supported. It is assumed that the number of FAs that can be supported by the base station 100 is 4, and accordingly, each transmission resource block is divided into four sub transmission resource blocks.

As such, when each transmission resource block is divided into four sub transmission resource blocks, the base station 100 may allocate transmission resources over a plurality of FAs. As a result, a frequency diversity gain can be obtained.

For example, when a transmission resource block is divided as shown by reference numeral (a), the minimum allocation unit of the transmission resource is present in one FA such as R (1, 0). On the other hand, in the case of reference numeral (b), four sub transmission resource blocks (= 1 transmission resource block) are the minimum allocation units, and the sub blocks are r (1, 0), r (2, 0), r (3). , 0), and r (4, 0), a plurality of frequencies can be used, and thus frequency diversity gain can be obtained.

As described above, according to an embodiment of the present invention, a sub-transmission resource block is configured by dividing one transmission resource block into the maximum number of FAs supported by the base station (n), and n different FAs are allocated to the minimum allocation units of transmission resources. If a sub transmission resource block is specified, the frequency diversity gain can be obtained according to the allocated transmission resource.

Resource allocation information will be described in the case where the minimum transmission resource is designated across the plurality of FAs as described above. 4B illustrates an example of transmission resource allocation in which minimum transmission resources are allocated across a plurality of FAs as shown in FIG. 4A.

Frequency bands that can be allocated by the base station 100 include FA 1 to FA 4, and a sub transmission resource block is configured by dividing one transmission resource block into the maximum number of FAs (n = 4) that the base station 100 can support. . Transmission resources allocated to the respective user terminals 201 to 204 are shown by hatching in the figure. Here, it is assumed that the first and second terminals 201 to 202 use four FAs, and the third and fourth user terminals 203 and 204 use two FAs.

In more detail, an address allocation method of each user terminal 200 will be described. 4B illustrates an address type applied to each user terminal 200 and a location where transmission resources are allocated according to the address type. At this time, the position to which the transmission resource is allocated is indicated by hatching. In addition, the following Table 6 shows resource allocation information (MAP-IE) of each user terminal according to FIGS. 4A and 4B.

Referring to (g) and <Table 6>, the address type is type 4 (Addr_type: 4) to represent a transmission resource allocated to the first user terminal 201, and is illustrated in (d) of FIG. 2B. Same type as shown. This is shown by reference numeral (g).

The base station 100 allocates a transmission resource block having addresses 0 to 11 as the resource of the first user terminal 201 in this address type. Accordingly, the address value of the allocated transmission resource block may be expressed as a start address (start: 0) and an allocation length (length: 3) from the start address to the transmission resource block where resource allocation ends. At this time, one address is allocated for each sub transmission resource block, but it should be noted that a unit of allocation length becomes one transmission resource block. When expressing an address value of an allocated transmission resource block using a start address and a start-end, a start address (start: 0) and an end address (end: 11) are described.

Referring to reference numeral (h) and <Table 6>, an address type Addr_type is used as a type 3 to express a transmission resource allocated to the second user terminal 202. This uses the same manner as the type as shown in (c) of FIG. 2B, and is shown at (h).

The base station 100 has allocated a transmission resource block having addresses 6 to 13 in this address type as a resource of the second user terminal 202. Therefore, the allocated transmission resource block may be expressed as a start address (start: 6) and an allocation length (length: 2) from the start address to the transmission resource block where resource allocation ends. Here, it should be noted that the unit of allocation length becomes one transmission resource block. To emphasize, in (h), allocation length 1 includes addresses 6, 7, 8, and 9, and allocation length 2 includes addresses 10, 11, 12, and 14. In the case of using a start address and a start-end, a start address (start: 6) and an end address (end: 14) may be described as an allocation address value.

Referring to (i) and <Table 6>, the third user terminal 203 using two FAs uses type 1 (Addr_type: 1) as an address type. Address type 1 (Addr_type: 1) uses FA 1 and FA 2, assigns an address first to the transport resource block of FA 1, and assigns an address to the transport resource block of FA 2. As such, the address type shown in (i) has the address type as shown in (e) of FIG. 3B.

The base station 100 allocates a transmission resource block having addresses 3 to 10 in this address type as a resource of the third user terminal 203. Accordingly, the allocated transmission resource block may be expressed as a start address (start: 3) and an allocation length (length: 2) from the start address to the transmission resource block where resource allocation ends. Here, the unit of allocation length becomes one transmission resource block. In addition, a start address (start: 3) and an end address (end: 10) may be used.

Referring to (j) and <Table 6>, the fourth user terminal 203 using two FAs uses address type 2 (Addr_type: 2). Address type 2 of reference symbol (j) is assigned an address sequentially from the first transmission resource block of FA 1 and FA 2 to the last transmission resource block, similarly to reference numeral (f) of FIG. 3B.

The base station 100 assigns a transmission resource block having addresses 28 to 31 in this address type as a resource of the fourth user terminal 204.

Accordingly, the allocated transmission resource block may be expressed as a start address (start: 28) and an allocation length (length: 1) from the start address to the transmission resource block where resource allocation ends. In addition, a start address (start: 28) and an end address (end: 31) may be used.

As described above, according to an embodiment of the present invention, when a transmission resource block is formed into a sub transmission resource block by dividing the maximum number of FAs supported by a base station, the minimum resource allocation unit may be allocated over a plurality of FAs. Thus, frequency diversity gain can be obtained. In addition, since there is no need to separately describe the address type and the assigned address value according to the address type for each FA, the overhead of resource allocation information (MAP-IE) does not occur.

Then, the configuration of the base station 100 and the user terminal 200 for transmitting and receiving the resource allocation information as described above will be described. First, a schematic configuration of a base station 100 of a frequency overlay system according to an embodiment of the present invention will be described. 5 is a diagram illustrating a schematic configuration of a base station of a frequency overlay system according to an embodiment of the present invention.

Referring to FIG. 5, the apparatus for allocating a transmission resource of the base station 100 according to the embodiment of the present invention includes an address type selecting unit 110, a resource allocating unit 120, and a map transmitter 130. do.

The address type selector 110 selects an address type for displaying an address of a transmission resource. In this case, the address type selector 110 selects an address type in consideration of the available FA number and FA number according to the available bandwidth of each user terminal 200. That is, when the address type selection unit 110 selects an address type for allocating transmission resources of the user terminals connected to the base station, the address type selection unit 110 considers the FA number, number and size of data of the user terminals. . Accordingly, the address type selection unit 110 selects the address type of each user terminal so that the load is evenly disposed in each FA, and as much data as possible can be allocated to the entire transmission resource.

The resource allocator 120 allocates transmission resources of each user terminal 200 and generates and outputs resource allocation information (MAP-IE) according to the address type of the allocated transmission resources. At this time, the resource allocating unit 120 allocates transmission resources in consideration of the available FA number and FA number according to the available bandwidth of each terminal. Then, the resource allocator 120 displays the address of the allocated transmission resource according to the address type of each terminal to generate and output resource allocation information (MAP-IE). Data bursts of each user terminal are allocated to transmission resources using the minimum number of resource indicators. As described above, the resource indicator includes an address type and an assigned address value. In addition, a method of indicating an assigned address value includes a "start-length" and a "start-end" method. For example, in Table 1, the address type is "Addr_type: 1", and the "start-length" method is represented by "start: 26, Length: 4" according to the method of displaying the assigned address value, and the "start- end "type is represented by" start: 26, end: 29 ".

The resource allocator 120 provides resource allocation information (MAP-IE) including an identifier (CID, connection ID), modulation coding scheme (MCS), power information, antenna information, etc. with all resource indicators. Create each.

The map transmitter 130 generates a MAP message by collecting resource allocation information MAP-IE of a user terminal whose corresponding FA is a primary FA for each FA. Then, map messages of all FAs are generated and transmitted through the corresponding FAs.

Next, a method for generating resource allocation information (MAP-IE) of a base station according to an embodiment of the present invention will be described. 6 is a diagram illustrating a method of generating resource allocation information according to an embodiment of the present invention.

Referring to FIG. 6, the base station 100 allocates transmission resources according to available bandwidth in step S601. That is, the base station 100 determines the available FA number and number according to the available bandwidth of each user terminal 200, and allocates transmission resources based on the determined FA number and number.

Then, the base station 100 selects an address type suitable for the transmission resource allocated in step S603. At this time, the base station 100 selects an address type according to the number of FAs allocated to the user terminal 200 and the location of the allocated transmission resources. Subsequently, the base station 100 describes the allocation address value of the allocated transmission resource in the resource allocation information (MAP-IE) according to the address type selected in step S605.

Accordingly, the base station 100 generates resource allocation information (MAP-IE) including the address type and the assigned address value in step S607. Subsequently, the base station 100 generates a MAP message by collecting resource allocation information MAP-IE of a user terminal whose corresponding FA is a primary FA for each FA in step S609. The base station 100 transmits a map message of each FA in step S611.

As described above, the MAP message is transmitted to each user terminal 200, and each user terminal 200 detects resource allocation information MAP-IE from the map message, and detects the resource allocation information MAP. -IE) can know the transmission resource allocated to itself.

Next, a schematic configuration of the resource allocation apparatus of the user terminal will be described. 7 is a diagram illustrating a schematic configuration of an apparatus for allocating resources of a user terminal of a frequency overlay system according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the apparatus for allocating a transmission resource of the user terminal 200 according to an exemplary embodiment of the present invention includes a data processor 210, a map analyzer 220, and an address type indicator 230.

The data processing unit 210 receives a map (MAP) message through the main FA, and receives data through the main FA and other FAs. In addition, the data processing unit 210 receives a signal of a transmission resource region allocated to itself according to the resource allocation information (MAP-IE) detected by the map analyzer 220, demodulates and decodes the received signal to burst the data. Outputs In this case, the data processor 210 selects an appropriate modulation and coding method according to the modulation and coding scheme (MCS) of the resource allocation information MAP-IE.

The map analyzer 220 detects its own resource allocation information (MAP-IE) from the map message received from the primary FA. Then, the map analyzer 220 detects the resource allocation information (MAP-IE) corresponding to the user terminal itself, and then allocates the allocation ID (CID), modulation and coding scheme (MCS) from the resource allocation information (MAP-IE). ), Resource indicators, etc. Here, it consists of address type and assigned address value. The map analyzer 220 determines the addresses of all transmission resources according to the obtained address type, and transmits the transmission resource region corresponding to the assigned address value acquired based on the determined address to the data processor 210.

The address type indicating unit 230 stores an available FA according to its available bandwidth and stores an address type according to the available FA. In addition, the address type indicating unit 230 transmits the address type according to the allocation resource information (MAP-IE) detected by the map analyzer 220 to the map analyzer 220. Then, the map analyzer 220 may calculate a transmission resource region allocated to the corresponding address type according to the corresponding address type, and transmit the calculated resource region to the data processor 210.

For example, in Table 1, the address type is "Addr_type: 1", and the "start-length" method is represented by "start: 26, Length: 4" according to the method of displaying the assigned address value, and the "start- end "method is represented as" start: 26, end: 29 ", so that the user terminal 200 can know the address of the allocated resource from the address type, and the location of the transmission resource block allocated to itself through the assigned address value. It can be seen. Accordingly, the user terminal may take data of the transmission resource block area allocated to the user terminal and demodulate and decode the data.

Next, a method of receiving resource allocation information of a user terminal according to an embodiment of the present invention will be described. 8 is a diagram for describing a method for receiving resource allocation information according to an embodiment of the present invention.

Referring to FIG. 8, the user terminal 200 receives a MAP message through the main FA in step S801. Here, the primary FA is determined when the user terminal 200 initially accesses the base station 100. Then, the user terminal 200 detects its own resource allocation information (MAP-IE) from the map message received in step S803. In the map message, there are a plurality of resource allocation information (MAP-IE) having the FA to which the corresponding map message is transmitted as the main FA, and each user terminal 200 has its own resource allocation information (MAP-IE) through the identifier. Can be detected.

The user terminal 200 that detects the resource allocation information (MAP-IE) recognizes the address type of the transmission resource region allocated to itself from the resource allocation information (MAP-IE) detected in step S805, and recognizes the address type in step S807. Knows the transmission resource area allocated to itself according to the address type. Then, the user terminal 200 extracts data of the area allocated to the user terminal 200 in step S809. As described above, the user terminal 200 may query the address type and the assigned address value of the resource allocation information and extract data of the transmission resource region allocated to the user terminal 200. Next, the user terminal 200 modulates and demodulates the data extracted in step S811. In this case, the user terminal 200 may query the modulation coding scheme (MCS) of the resource allocation information (MAP-IE) to demodulate and decode the data of the transmission resource block region allocated to the user terminal 200.

While the present invention has been described using some preferred embodiments, these embodiments are illustrative and not restrictive. As such, those of ordinary skill in the art will appreciate that various changes and modifications can be made according to equivalents without departing from the spirit of the present invention and the scope of rights set forth in the appended claims.

1 is a conceptual diagram of a frequency overlay system according to an embodiment of the present invention.

2A to 2B are diagrams for explaining a transmission resource allocation method according to an embodiment of the present invention.

3A and 3B illustrate a transmission resource allocation method according to an embodiment of the present invention.

4A to 4C are diagrams for describing a resource allocation method and a method for generating allocation information of allocated resources in a frequency overlay system according to an embodiment of the present invention.

5 is a diagram illustrating a schematic configuration of a base station of a frequency overlay system according to an embodiment of the present invention.

6 is a diagram illustrating a method for generating resource allocation information according to an embodiment of the present invention.

7 is a diagram illustrating a schematic configuration of an apparatus for allocating resources of a user terminal of a frequency overlay system according to an exemplary embodiment of the present invention.

8 is a diagram illustrating a method for receiving resource allocation information according to an embodiment of the present invention.

Claims (6)

In the frequency overlay system for resource allocation, A base station for transmitting resource allocation information including one address type among a plurality of address types and an allocation address value of transmission resources allocated according to the one address type; And And a user terminal which receives the resource allocation information and receives data of the allocated transmission resource according to the address type and the assigned address value of the received resource allocation information. In the transmission resource allocation method of the frequency overlay system, Transmitting, by the base station, resource allocation information including one address type among a plurality of address types and an allocation address value of a transmission resource allocated according to the one address type; A user terminal receiving the resource allocation information and receiving data of the allocated transmission resource according to the address type and the assigned address value of the resource allocation information received by the user terminal; transmission resource allocation of the frequency overlay system, comprising: Way. In the transmission resource allocation apparatus of the base station according to the frequency overlay system using the available frequency divided into a plurality of frequency bands, An address type selection unit for selecting an address type according to an allocation frequency (FA) of a user terminal to which resources are allocated among a plurality of connected user terminals; A resource allocator configured to generate resource allocation information indicating an allocated address of the user terminal according to the selected address type; And And a map transmitter for generating a map message having the resource allocation information and transmitting the same through a primary FA of the user terminal. In the transmission resource allocation method of the base station according to the frequency overlay system using the available frequency divided into a plurality of frequency bands, Generating resource allocation information including one address type among a plurality of address types and an allocation address value of a transmission resource allocated according to the one address type; Generating a map message having the resource allocation information; And transmitting the map message through a primary FA of the corresponding user terminal. In the transmission resource allocation apparatus of the user terminal according to the frequency overlay system using the available frequency divided into a plurality of frequency bands, A map analyzer for receiving a map message through a primary allocation frequency and detecting resource allocation information from the received message; And And a data processor for receiving a transmission resource region allocated to the terminal according to the address type and the allocation address value of the resource allocation information. In the transmission resource allocation method of the user terminal according to the frequency overlay system using the available frequency divided into a plurality of frequency bands, Receiving a map message from a primary allocated frequency and detecting resource allocation information from the received map message; And receiving data of a transmission resource region allocated to the terminal according to the address type and the allocation address value of the resource allocation information.

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